[Bug 57501] New: [BISECTED] i915: power regression when display is off

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=57501

           Summary: [BISECTED] i915: power regression when display is off
           Product: Drivers
           Version: 2.5
    Kernel Version: 3.7.3+
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: low
          Priority: P1
         Component: Video(DRI - Intel)
        AssignedTo: intel-gfx-bugs at lists.freedesktop.org
        ReportedBy: matthias_dienstbier at yahoo.de
                CC: intel-gfx-bugs at lists.freedesktop.org
        Regression: Yes


Starting with Linux 3.7.3 the power usage of my laptop does not drop as low as
before when the display is switched off (~2W difference on AC). With the
display being on, power usage is normal.

I bisected from v3.7.2 (good) to v3.7.3 (bad) and found the responsible commit
cf787fa284598caea41c63d10cff91ff3ecb9671

I'm currently running Linux 3.9 and the problem is still there.

Hardware info:
00:02.0 VGA compatible controller: Intel Corporation Mobile GM965/GL960
Integrated Graphics Controller (primary) (rev 0c)
00:02.1 Display controller: Intel Corporation Mobile GM965/GL960 Integrated
Graphics Controller (secondary) (rev 0c)

Please tell me what additional information you need for resolving this bug.

Thanks!

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